For now, the General Preferences section of your account contains the PTR (Pointer) Records function, which allows you to enable or disable the automatic creation of PTR Records records.
When the Automatically create PTR records is enabled, the automatic creation of PTR records will only apply to (the standard) /24, /16, and /8 reverse zones. Classless reverse zones are currently not supported.
Use the drop-down menu to either Enable or Disable this feature for your account.